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vekshin1
3 years ago
15

What prevents small particles from entering the lung cavity?

Biology
1 answer:
Ket [755]3 years ago
7 0

Answer:

Cilia

Explanation:

Cilia propel a liquid layer of mucus that covers the airways. The mucus layer traps pathogens (potentially infectious microorganisms) and other particles, preventing them from reaching the lungs.

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What is the difference between sensory, motor and relay neurons?​
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Answer:

Sensory neurons are found in receptors such as the eyes, ears, tongue and skin, and carry nerve impulses to the spinal cord and brain. Relay neurons are found between sensory input and motor output/response. Relay neurons are found in the brain and spinal cord and allow sensory and motor neurons to communicate.

Explanation:

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5 0
3 years ago
Jill has been experiencing recurring periods of shortness of breath, sweating, trembling, faintness, and a feeling of unreality
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Which is the main organ of the excretory system?
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A. Kidney 
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4 0
3 years ago
The region in the nucleus that is involved in ribosome production. *
Mumz [18]

Answer:

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